EP 0781062 A3 19990414 - Radiotelephone system
Title (en)
Radiotelephone system
Title (de)
Funktelefonsystem
Title (fr)
Système radio-téléphonique
Publication
Application
Priority
US 57667595 A 19951221
Abstract (en)
[origin: EP0781062A2] Disclosed is a method for operating a radiotelephone system, and a radiotelephone system that operates in accordance with the method. The method includes the steps of: (a) detecting a reception of a start of a DTMF signal from a Public Switched Telephone Network; (b) constructing a first message for indicating a PSTN telephone keypad key that corresponds to the detected start of the DTMF signal; (c) transmitting the first message over a radio channel; (d) receiving the first message from the radio channel with a radiotelephone; and (e) responsive to the received first message, generating a corresponding DTMF audio tone within the radiotelephone. The method further includes the steps of: (f) detecting a reception of a termination of the DTMF signal from the Public Switched Telephone Network; (g) constructing a second message for indicating the PSTN telephone keypad key that corresponds to the detected termination of the DTMF signal; (h) transmitting the second message over the radio channel; (i) receiving the second message from the radio channel with the radiotelephone; and (j) responsive to the received second message, terminating the generation of the corresponding DTMF audio tone within the radiotelephone. <IMAGE>
IPC 1-7
IPC 8 full level
H04B 7/26 (2006.01); H04M 11/00 (2006.01); H04Q 7/30 (2006.01); H04W 88/18 (2009.01)
CPC (source: EP)
H04W 88/181 (2013.01)
Citation (search report)
- [X] GB 2290005 A 19951206 - MOTOROLA LTD [GB]
- [XA] EP 0534852 A1 19930331 - MATRA COMMUNICATION [FR]
- [X] GB 2262683 A 19930623 - BRITISH AEROSPACE SPACE AND CO [GB]
Designated contracting state (EPC)
CH DE FI FR GB LI SE
DOCDB simple family (publication)
EP 0781062 A2 19970625; EP 0781062 A3 19990414; CA 2187832 A1 19970622; CN 1159722 A 19970917; JP H09186647 A 19970715
DOCDB simple family (application)
EP 96308080 A 19961107; CA 2187832 A 19961015; CN 96123266 A 19961220; JP 33615296 A 19961216